protected static function pieceToForsyth(Piece $piece)
{
static $reverseClasses = array('Pawn' => 'p', 'Rook' => 'r', 'Knight' => 'n', 'Bishop' => 'b', 'Queen' => 'q', 'King' => 'k');
$notation = $reverseClasses[$piece->getClass()];
if ('white' === $piece->getColor()) {
$notation = strtoupper($notation);
}
return $notation;
}
/**
* Dumps a single move to PGN notation
*
* @return string
**/
public function dumpMove(Game $game, Piece $piece, Square $from, Square $to, array $playerPossibleMoves, $killed, $isCastling, $isPromotion, $isEnPassant, array $options)
{
$board = $game->getBoard();
$pieceClass = $piece->getClass();
$fromKey = $from->getKey();
$toKey = $to->getKey();
if ($isCastling) {
if ($this->isCastleKingSide($piece, $to)) {
return 'O-O';
} else {
return 'O-O-O';
}
}
if ($isEnPassant) {
return $from->getFile() . 'x' . $to->getKey();
}
if ($isPromotion) {
return $to->getKey() . '=' . ('Knight' === $options['promotion'] ? 'N' : $options['promotion'][0]);
}
$pgnFromPiece = $pgnFromFile = $pgnFromRank = '';
if ('Pawn' != $pieceClass) {
$pgnFromPiece = $piece->getPgn();
$candidates = array();
foreach ($playerPossibleMoves as $_from => $_tos) {
if ($_from !== $fromKey && in_array($toKey, $_tos)) {
$_piece = $board->getPieceByKey($_from);
if ($_piece->getClass() === $pieceClass) {
$candidates[] = $_piece;
}
}
}
if (!empty($candidates)) {
$isAmbiguous = false;
foreach ($candidates as $candidate) {
if ($candidate->getSquare()->getFile() === $from->getFile()) {
$isAmbiguous = true;
break;
}
}
if (!$isAmbiguous) {
$pgnFromFile = $from->getFile();
} else {
$isAmbiguous = false;
foreach ($candidates as $candidate) {
if ($candidate->getSquare()->getRank() === $from->getRank()) {
$isAmbiguous = true;
break;
}
}
if (!$isAmbiguous) {
$pgnFromRank = $from->getRank();
} else {
$pgnFromFile = $from->getFile();
$pgnFromRank = $from->getRank();
}
}
}
}
if ($killed) {
$pgnCapture = 'x';
if ('Pawn' === $pieceClass) {
$pgnFromFile = $from->getFile();
}
} else {
$pgnCapture = '';
}
$pgnTo = $to->getKey();
$pgn = $pgnFromPiece . $pgnFromFile . $pgnFromRank . $pgnCapture . $pgnTo;
return $pgn;
}
public function extractPieces()
{
$pieces = array();
if (!empty($this->ps)) {
foreach (explode(' ', $this->ps) as $p) {
$pos = Board::keyToPos(Board::piotrToKey($p[0]));
$class = Piece::letterToClass(strtolower($p[1]));
$piece = new Piece($pos[0], $pos[1], $class);
if (ctype_upper($p[1])) {
$piece->setIsDead(true);
}
$pieces[] = $piece;
}
}
$this->setPieces($pieces);
}
public function add(Piece $piece)
{
$this->pieces[$piece->getSquareKey()] = $piece;
}